Charmast Portable Charger 10000mAh

Technical details

For a backup charger, the main choice is often convenience versus a simpler battery pack with fewer built-in parts. This Charmast combines a 10,000mAh battery with a foldable AC wall plug and built-in charging cables.

Its connections include a cable for iPhone, a 2-in-1 USB-C/Micro USB cable, and USB-C and USB-A ports. It can charge up to four compatible USB-powered devices at once, but the total output is shared and tops out at 15W (5V/3A). That’s useful for keeping several devices connected, not a promise of fast charging for each one simultaneously.

The charger is 0.72 inches thick and weighs 8 oz. An LED display shows the remaining battery level, and its 38.5Wh rating is described as suitable for carry-on air travel. The listing estimates up to 1.8 charges for iPhone 17/16 or 1.6 for Samsung Galaxy S25, actual results can vary with the device and how it’s used.

Getting the most from it

The built-in plug is the standout convenience: unfold it and connect the pack directly to a wall outlet, rather than packing a separate adapter to recharge the battery. It can also recharge through its USB-C input. The listed recharge times are about five hours with a 5V/3A USB-C charger and about six hours from the built-in AC plug. Pass-through charging is supported, so the pack can recharge while powering connected devices.

It makes sense if you want one travel-friendly backup for a phone and smaller USB devices, with fewer loose cables to keep track of. The trade-off is that built-in cables and a wall plug make this less like a bare-bones battery pack, anyone who prefers choosing separate cables or needs more than 15W total output may favor a different setup. Without having tried it, the most useful thing to weigh is whether its all-in-one convenience matters more than charging speed across several devices.

Usage tips

For a commute, you could plug in a phone and earbuds while keeping the charger in a bag, then use its built-in AC plug at a stop with a wall outlet. When charging several devices together, expect the available output to be divided among them. If a faster top-up is the priority, charging fewer devices at once is the more sensible approach, though the listing doesn’t give separate output figures for each connection.

The built-in cables reduce what you need to carry, but they also mean you should check that their connector types suit the devices you plan to bring. The product is listed as compatible with iPhone, Samsung Galaxy, Google Pixel, iPad, and other Android devices, compatibility depends on using the appropriate connection.

Practical doubts

Can it recharge without a separate wall adapter? Yes. Its foldable AC plug connects directly to an outlet, USB-C input is another recharge method.

Can it power four devices at full speed at once? It can connect to up to four devices, but the combined output is shared and capped at 15W.

Is it listed for carry-on air travel? Yes. The product is rated at 38.5Wh and described as ready for carry-on air travel. Check any airline-specific rules that apply to your trip.

Buying verdict

Choose this Charmast if built-in cables, direct wall recharging, and a visible battery-level display would make everyday or travel charging easier. Its clearest limitation is the shared 15W output, especially when several devices are connected. You may want to skip it if your priority is higher total output or a plain power bank that lets you select every cable separately. The listing also states a three-year warranty and 24/7 customer service.